Announced at VMworld
2008, Cisco will soon release a new software switch, running the Cisco IOS, that will run on x86 systems using VMware ESX
Server. David Davis tells you how this new virtual Cisco switch could help you and how it will change the administration of
Cisco networks
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I was fortunate enough to be a judge for the best
new products of VMworld in Las Vegas last week. I was actually a judge of the best new products category in which the Cisco
Nexus 1000V was entered. One of my fellow judges was Rick Vanover. Rick has written a good article on the Cisco Nexus 1000V
(see Virtual switching to become enhanced with Cisco and VMware announcement), but what I want to do is to analyze this new product announcement from the perspective of Cisco administrators.
What is the Cisco Nexus 1000V?
Let’s start defining what the Cisco
Nexus 1000V is and what it is not. As I have seen the Cisco Nexus 1000V with my own eyes, I can tell you a few things about
the 1000V:
It’s a software
switch that integrates with the ESX Server kernel.
It has a management feature
running inside a virtual guest machine.
The 1000V runs the Cisco IOS
and you can telnet to it, using the CLI, just as you would other Cisco switches.
A distributed virtual switch
(dvswitch) is used to connect between all ESX host systems and the Cisco 1000V is what controls that.
The 1000V has some basic layer
3 functionality.
It has control over all the
physical NIC cards on the ESX host systems and all the virtual switch ports on each ESX host.
The 1000V is not:
A hardware switch
A virtual appliance running
on every ESX Server
Just the IOS loaded inside
a VM guest
Available until 2009 when
VMware releases the next revision of its Virtual Infrastructure / ESX Server software
How will the Cisco Nexus 1000V change Cisco networking?
What I thought was most interesting about the Cisco
Nexus 1000V was that I believe it will truly change the way that Cisco netwoes to the network configuration. Now, the same
person who administers the Cisco network can telnet or SSH to the management interface for the VMware ESX Server / Cisco virtual
network switch and administer this new switch just like they are used to doing — by using the Cisco IOS.
With that single IOS interface, the network admin
can administer ALL the network interfaces on every ESX server as a single network switch. Each NIC on each ESX Server is like
a physical interface on a single switch because they are all connected with the new distributed virtual switch. And, now the
Virtual Cisco switch can be administered with traditional network management appliances and troubleshooting tools.
Because the roles of network administration and virtual
infrastructure administration can now be defined, net admins can take a part in the virtual network.
Additionally, this new Cisco 1000V virtual switch
will give net admins the power of traditional Cisco IOS switch features in the virtual infrastructure — features
like spanning tree, Netflow, MAC address filtering, and more.
Conclusion
This is Cisco’s first venture into
the virtual networking space, and it will be a huge change for both Cisco network admins and VMware virtual infrastructure
admins because it will allow Cisco admins the ability to configure all the virtual network properties of an entire virtual
infrastructure from a single Cisco IOS interface. So, Cisco admins — are you ready to start administering the
virtual network?
For
more information, see Cisco & VMware’s joint announcement on the Cisco Nexus 1000V.